Device for controlling the tension of thread or yarn



Jan. 2, 1951 c. CHRISTIANSEN ETAL 2,536,537

DEVICE FOR CONTROLLING THE TENSION OF THREAD OR YARN Filed Jan. 5, 1946 I ar/708x Mum 054mg gain 0.1a. QuwL 1 wam m,%wwwau Patented Jan. 2, 1951 DEVICE FOR CONTROLLING THE TENSION OF THREAD OR YARN Christian Christiansen, Lille Foren, V. Aker, near Oslo, and Gustav Otto Karl Riisch, Manda],

Norway Application June 3, 1946, Serial No. 674,092

, In Norway October 27, 1943 Section 1, Public Law 690, August 8, 1946 Patent expires October 27, 1963 1 Claim. 1

The present invention relates to devices for controlling the tension of threads or yarns, especially in spinning machines, twisting machines, looms and the like.

Previously there have for this purpose been used jamming brakes through which the thread was pulled, or drums around which the threads were passed and which were provided with a disk brake or other kind of brake. These devices had the disadvantage that it was difiicult to regulate the tension of the threads satisfactorily. It always was uncertain as to whether the attendants had adjusted the brakes correctly, and the result was that the tension of the thread easily became too low, or too high, so that the threads might break. At all events, the braking effect became irregular with the result that an uneven product was obtained.

The object of the present invention is to provide a controlling device which removes the said disadvantages. The device according to the invention comprises two drums rotatably mounted on parallel pivots and interconnected by means of cogwheels or the like, and around the cylindrical surfaces of which the thread is passed. By suitable relative dimensioning of the drums and the cog-wheels, the pull of the thread will set the drums in rotation, and the thread is passed around the drums in such way that it slides around one of the drums in the direction opposite to the direction of rotation of this drum,

whereby the friction between the thread and the drum induces an effective brake effect on the thread. The effect of friction will always be the same for the same number of windings of the thread around the drums and the total brake effeet on the thread therefore may be adjusted simply by varying the number of windings. This can be controlled at any time during the running of the machine so that an even product always can be obtained.

The drums preferably are provided with pertpherical grooves in the cylindrical surfaces for guiding the thread.

The drums may be driven at diiferent or the same speed and be of different or the same diameter. Preferably the drums have the same number of revolutions and different diameters, the rotation being effected by the pull of the thread on the drum with the largest diameter.

The drawing shows an example of a device according to the invention used for controlling of the tension of the weft thread or yarn in a circular loom for weaving of tubes or hoses, for which use the device is particularly suitable. Fig. 1 shows the device looking from above.

mounted on a sector carrier of the kind commonly used for such looms, and Fig. 2 is a side elevation of the device.

I is the sector carrier with the sector 2 which in known manner serves for pressing of the weft thread in between the warp threads. The controlling device comprises the two drums 3 and 4 which are mounted on parallel pivots and are connected with the cog-wheels 5, 6 respectively gearing with each other so that the drums are rotating in opposite directions. The drums further are provided with peripherical grooves l, 8 respectively in which the weft thread is guided so that it passes around both drums and by its movement sets the same in rotation.

In is the weft thread which in the usual way is passed around guiding pins ll before it passes the drum 5 and 4 from where it is guided over the roller l2 to the weaving point.

We claim:

In a textile machine, a means for regulating the tension applied to thread supplied to the weaving element of the machine comprising two drums spaced apart and supported for rotation about axes lying parallel to one another, means for drivingly connecting the two said drums for rotation in opposite directions, one of said drums having a greater peripheral speed than the other of said drums, means for rotating said drums in a manner adapted to tension the thread supplied to the said weaving element, said means consisting of turns of said thread passed around both said drums, the said turns being made so that the thread passes from the said one drum to the weaving element, the rotation of the said one drum being opposite to the direction in which the thread leaves the drum.

CHRISTIAN CHRISTIANSEN. GUSTAV OTTO KARL RUSCH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,986,776 Moore J an. 1, 1935 2,158,547 Lawson et al. May 16, 1939 2,306,660 Gift, Jr Dec. 29, 1942 FOREIGN PATENTS Number Country Date 70,986 Norway Aug. 19, 1946 650,723 Germany July 1, 1931 

